The Belief in Hollow Planets
It isn’t strange to wonder about hollow planets. This belief has existed almost as long as humans.
Planets and Sir Isaac Newton.
The forming planet keeps swirling, and the gravity produces a magnetic field, protecting the planet and preventing the atmosphere from drifting into the universe. The basis of this belief is found in Newton’s theory.
Newton’s Shell Theorem
Using a lot of calculus, Newton proved that any object in the center of a hollow shell (like a hollow planet) would be weightless. This is because the force acting on the object doesn’t come from what is above it but the force acting below it.